Fan



Oct. 26 1926. I 1,604,877

, J. A. BURCKHALTER FAN I Filed August 29, 1925 INVENTOR JZ .Bure

ATTORNEYS I WITNESSES Patented Oct. 26, 1926.

UNITED STATES JAMES AUBRF Y BURCKHALIER, 0F BARNWELL, SOUTH CAROLINA.

FAN.

Application filed August 29, 1925.

This invention relates to fans or blowers, an object of the invention being to provide a rotary fan or blower having improved construction of blades or vanes, the blades functioning not only to deflect the air by reason of their shape but also constituting nozzles which function to deflect, compress and discharge air in continuous jets or streams.

A. further object is to provide a fan or blower with a circular series of blades or vanes, each blade or vane constituting an air deflector, an air compressor and discharge nozzle.

A further object is to provide a fan or blower which is especially adapted for use as an air cooling means for internal combustion engines on motor vehicles, but which is, of course, adapted for a wide range of utility, and I do not limit myself to any particular use.

With these and other objects in view, the invention consists in certain novel features of construction, and combinations and arrangements of parts, which will be more fully hereinafter described and pointed out in the claim.

In the accompanying drawings Figure 1 is a view in elevation of my improved fan or blower;

Figure 2 is a view in section on the line 22 of Figure 1;

Figure 3 is a perspective view of one of the blades or vanes looking at the inlet end of the nozzle formation thereof;

Figure 4 is a view in elevation of one of the blades or vanes looking at the opposite side of that shown in Figure 3;

Figure 5 is an exaggerated view in section on the line 5-5 of Figure 1.

The arrows A in Figures 1 and 5 indicate the direction of motion and the other arrows in these figures indicate the direction of movement or flow of the air when the fan or blower is revolved.

My improved fan or blower comprises a circular series of radially disposed blades or vanes 1, which may of course be mounted in various different ways so as to hold them in proper assemblage.

I have illustrated one form of construction in which all of the blades or vanes are se cured to a central spider 2 having a central hub 3 with an outer ring 4 secured to the outer portions of all the blades or vanes 1. The hub 3 is secured to a shaft 5 having any suitable support or mounting 6, and 7 repretion.

Serial No. 53,374.

scnts a pulley which may be located on the shaft 5 and receive motion from the belt from any suitablesource of power. When the fan is used in connection with a motor the fan will be driven by the ordinary fan belt as is customary in the art My invention has to do particularly with the construction of the blade or vane 1, and I would have it distinctly understood that While I have illustrated six blades or vanes in a circular series I do not limit myself to any particular number as I may employ as many or as few of these blades as may be desired.

As each of the blades or vanes is alike,

a description hereinafter alike to all.

Each blade or vane comprises a pair of plates 8 and 9, spaced apart so as to form transversely of the blade or vane an air nozzle. These plates or vanes are connected at their outer and inner ends and may be formed of a single sheet of metal, bent into shape as indicated, or they may be of any desired number of parts rigidly connected.

I would call particular attention to Figure 5 of the drawing which illustrates one of one will apply :Wv of. these blades or vanes in transverse sec- It will be noted that while both plates 8 and 9 are angularly disposed transversely or curved transversely so as to give the de sired air deflection when the fan is rotated, the pair of plates 8 and 9 are disposed at an angle to each other so that they provide a nozzle which is widest at its inlet end and depressed toward its outlet end; and at its outlet end these plates 8 and 9 are given a curve, as indicated at 10. so that the discharge of air is at an angle to its flow through the nozzle and in the direction of the flow of air deflected or driven by the angular or curved disposition of the surface of the plates.

My object in so constructing a blade or vane is not only to secure all the benefits of an ordinary plate to deflect or force the air in a given direction. but I also accomplish the additional result of entrapping or confining a portion of the air within a tapering nozzle which functions to compress the air and discharge the same in a well defined jet or stream at its outlet end in the direction of movement of the air imparted by the surface deflection of the blade or vane.

In operation, the fan or blower is turned in a direction as indicated by the arrows A so that the air enters the larger ends of the nozzles and is discharged through the smaller or narrower ends, and at the same time the air deflection, due to the surface or angular shape or contour of the blades. is forced in the same direction as the compressed air from the nozzles. By this means I not only obtain the ordinary force of air, such as is common with the blade type of blower or fan but in addition I secure a series otcontinuous streams or jets of compressed air which greatly increases the volume as well as the iore ofthe draft.

Various slight changes and alterations might be made in thegeneral form of the parts described without departing" from my invention, and hence I" do not limit myseli to the precise detailsset forth but consider myself at libert to make such slight changes and alterations as fairly all within the spirit and scope of the appended claim.

I claim:

A fan or blower, including a circular series of blades or vanes, means rigidly connecting said blades or vanes. each blade or vane comprising a pair of plates spaced apart, located at an angle to each other and connected at their inner and outer portions, the rear portions of said blades or vanes having a sharp curvature whereby nozzles are formed for discharging air from between the plates in a direction substantially in line with the axis of the blower, said plates being: flared apart from the nozzle endsto their opposite ends.

JAMEs AUBREY BURCKHALTER 

